Cora»Occultation

2026-09-28 / UCAC4 525-047565 / (1212) Francette

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Tim Haymes	O+	VID	M280	GB	GPS	03:08:00	03:09:10.1	03:09:12.93	03:10:00	0.200	0.150	2.83	87.7
2	show	Nikolai Wuensche	O+	VID	M300	DE	GPS	03:08:00	03:09:28.46	03:09:29.75	03:11:00	0.050	0.050	1.29	40.0
3	show	Konrad Guhl	O+	CCD	M306	DE	GPS	03:07:05	03:09:27.82	03:09:30.62	03:11:41	0.040	0.050	2.80	86.8

UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):

JPL75 : f94d7d80-d9b1-11f1-43f3-c05affff67a9 [db: observed]

Using prediction f94d7d80-d9b1-11f1-43f3-c05affff67a9 for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result:
Size = 95 x 88 km
a',b' = 47.3, 43.9 km
X0,Y0 = -839.4, 35.2 km
Mean diameter = 91 km

From 3 chords (CCD,VID)

You can enter space separated chord numbers (example: 11 4 8) or a method like VIS to ignore all visual timings, or a time source like RAD and NTP (but not GPS).
If the plot disappears, then there are less than 2 chords left (too much ignored, go back with browser).

Check SiMDA for size and mass data.

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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : f94d7d80-d9b1-11f1-43f3-c05affff67a9 [observed] Occultation Date + Time : 2026-09-28 at 03:11:42 UT +/- 0.01 min [1] Object Designation : (1212) Francette Orbit Class : MBA Star Designation : GDR3 0655315973901714688 Star Coordinates (ICRF) : RA = 08 16 26.6753, DE = +14 59 42.502 [2] Star Magnitudes : G = 11.88 mag, RP = 11.17 mag, BP = 12.44 mag Object Magnitude : V = 15.84 mag Estimated Magnitude Drop : 4.0 mag Estimated Max. Duration : 2.7 sec Object Mean Diameter : 82.1 km (src: astorb) Speed of the shadow : 31.0 km/s Elongation to Moon & Sun : 100° (sunlit = 97%), Sun = 62° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL75 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : f94d7d80-d9b1-11f1-43f3-c05affff67a9 [observed]

 Occultation Date + Time   : 2026-09-28 at 03:11:42 UT +/- 0.01 min  [1]
 Object Designation        : (1212) Francette
 Orbit Class               : MBA
 Star Designation          : GDR3 0655315973901714688
 Star Coordinates (ICRF)   : RA = 08 16 26.6753, DE = +14 59 42.502  [2]
 Star Magnitudes           : G = 11.88 mag, RP = 11.17 mag, BP = 12.44 mag
 Object Magnitude          : V = 15.84 mag
 Estimated Magnitude Drop  : 4.0 mag
 Estimated Max. Duration   : 2.7 sec
 Object Mean Diameter      : 82.1 km  (src: astorb)
 Speed of the shadow       : 31.0 km/s
 Elongation to Moon & Sun  : 100° (sunlit = 97%), Sun = 62°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL75
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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